Model physically associating gels deformed in shear over a wide range of reduced rates displayed evidence of strain localization. The non-linear stress responses and inhomogeneous velocity profiles observed during shear rheometry coupled with particle tracking velocimetry were associated with the occurrence of rate-dependent, banding and fracture-like responses in the gel. Scaling law analysis from traditional sliding friction studies suggests that at the molecular level, deformation is confined to a shear zone with thickness comparable to the gel’s mesh size, the smallest structurally relevant length scale in the gel.
Date of this Version
Erk, Kendra; Martin, Jeffrey D.; Hu, Y. Thomas; and Shull, Kenneth R., "Extreme strain localization and sliding friction in physically associating polymer gels" (2012). School of Materials Engineering Faculty Publications. Paper 4.